NASA has selected a heliophysics mission to move into the next phase of development amid broader concerns about the state of ...

The X‑arithmetic technique offers a powerful new way to map the physics of other galactic structures across the universe and ...

Supernovae aren't one of the JWST's main science themes, but the perceptive telescope is full of surprises. Recently, it ...

A strange X-ray signal spotted decades ago may be the result of a star that got attacked by two black holes, one after the ...

A sudden X-ray flare from a supermassive black hole in galaxy NGC 3783 triggered ultra-fast winds racing outward at a fifth the speed of light—an event never witnessed before. Using XMM-Newton and ...

Decades before hypersonics entered today's headlines, NASA drafted an aircraft that bordered on surreal. Discover the story ...

The F-15 is the fastest Boeing fighter jet, but it is not the fastest military jet Boeing has built or claims lineage.

When the program was initiated, no aircraft had been propelled to hypersonic speeds by an air-breathing engine. The NASA X-43 is the fastest aircraft ever built by NASA. The experimental unmanned ...

A new feature on X has stirred confusion, anger and a wave of online sleuthing after users discovered that the platform was suddenly displaying the surprising locations where certain accounts are ...

NASA has revealed more detail about the recent first flight of its X-59 Quesst supersonic demonstrator jet, a milestone the agency describes as demonstrating its continued ability to manage ...

You'll soon be able to see more information about X accounts, including where they're based and how many times they've changed their usernames. X is rolling out a new feature called "About this ...

The Department of Defense operates several ranges across all service branches to test the effectiveness of military systems in the land, sea, air, space, and cyberspace domains. These ranges and ...